Lubricating oil compositions containing pre-ceramic polymers
AssigneeInfineum International Limited
InventorsNigel A. Male, Stuart A. Taylor, Russell M. Thompson, Anton Coulthurst
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Abstract
A lubricating composition comprises an oil of lubricating viscosity, a metal-free pre-ceramic polymer and one or more co-additives. The metal-free pre-ceramic polymer comprises a plurality of repeat units which do not contain oxygen. The pre-ceramic polymers provide the lubricating oil composition with antiwear properties. Also described is a method of lubricating an internal combustion engine and the use of a lubricating oil composition containing a pre-ceramic polymers to inhibit wear in an internal combustion engine.
Claims54
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer and one or more co-additives, wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (I):
- where X is NH, NR, BR3 or R4;
- or wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (II), (III), (IV):
- wherein R, R1, R2, R3, R4, R5, R6 and R7 are independently linear, branched or cyclic alkyl or alkenyl groups, or aryl groups containing 1 to 30 carbon atoms, wherein said metal-free pre-ceramic polymer having a repeat unit of formula (I):
- is not capped with an amine or polyamine.
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer and one or more co-additives, wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (I):
- where X is NH, NR, BR3 or R4;
- or wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (II), (III), (IV):
- wherein R, R1, R2, R3, R4, R5, R6 and R7 are independently linear, branched or cyclic alkyl or alkenyl groups, or aryl groups containing 1 to 30 carbon atoms, wherein the repeat units of formulae (I) to (VI) form a closed ring structure.
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer and one or more co-additives, wherein the metal-free pre-ceramic polymer comprises a compound of structure (VII):
- wherein R1, R2 and R8 are independently hydrocarbyl groups containing 1 to 30 carbon atoms, provided that at least one of R1, R2 and R8 contains at least 3.
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer and one or more co-additives, wherein the metal-free pre-ceramic polymer comprises a compound of structure (VIII):
- wherein R1 and R2 are independently hydrocarbyl groups containing 1 to 30 carbon atoms, provided that at least one of R1 and R2 contains at least 3 carbon atoms.
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer and one or more co-additives, wherein the metal-free pre-ceramic polymer comprises a mixture of a compound of structure (VII):
- wherein R1, R2 and R8 are independently hydrocarbyl groups containing 1 to 30 carbon atoms, provided that at least one of R1, R2 and R8 contains at least 3 carbon atoms;
- and a compound of structure (VIII):
- wherein R1 and R2 are independently hydrocarbyl groups containing 1 to 30 carbon atoms, provided that at least one of R1 and R2 contains at least 3 carbon atoms.
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer and one or more co-additives, wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (I):
- where X is NH, NR, BR3 or R4;
- or wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (II), (III), (IV):
- wherein R, R1, R2, R3, R4, R5, R6 and R7 are independently linear, branched or cyclic alkyl or alkenyl groups, or aryl groups containing 1 to 30 carbon atoms, wherein:
- 1) the one or more co-additives comprises an oil-soluble or oil-dispersible molybdenum-containing compound, a metal-containing detergent, an ashless dispersant, an ashless friction modifier, a viscosity modifier, an anti-oxidant, a rust inhibitor, a copper and lead bearing corrosion inhibitor, a demulsifier or a pour point depressant, 2) the one or more co-additives comprises a zinc dihydrocarbyl dithiophosphate in an amount sufficient to provide from greater than 800 ppm to 1200 ppm by mass of phosphorous to the lubricating oil composition, based upon the total mass of the lubricating oil composition, and as measured in accordance with ASTM D5185, and 3) said metal-free pre-ceramic polymer having a repeat unit of formula (I):
- is not capped with an amine or polyamine.
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer and one or more co-additives, wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (I):
- where X is NH, NR, BR3 or R4;
- or wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (II), (III), (IV):
- wherein R, R1, R2, R3, R4, R5, R6 and R7 are independently linear, branched or cyclic alkyl or alkenyl groups, or aryl groups containing 1 to 30 carbon atoms, wherein:
- 1) the one or more co-additives comprises an oil-soluble or oil-dispersible molybdenum-containing compound, a metal-containing detergent, an ashless dispersant, an ashless friction modifier, a viscosity modifier, an anti-oxidant, a rust inhibitor, a copper and lead bearing corrosion inhibitor, a demulsifier or a pour point depressant, 2) the one or more co-additives comprises a zinc dihydrocarbyl dithiophosphate in an amount sufficient to provide no greater than 800 ppm by mass of phosphorous to the lubricating oil composition, based upon the total mass of the lubricating oil composition, and as measured in accordance with ASTM D5185, and 3) said metal-free pre-ceramic polymer having a repeat unit of formula (I):
- is not capped with an amine or polyamine.
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer, a zinc dihydrocarbyl dithiophosphate, and one or more co-additives, wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (II), (III), (IV):
- wherein R, R1, R2, R3, R4, R5, R6 and R7 are independently linear, branched or cyclic alkyl or alkenyl groups, or aryl groups containing 1 to 30 carbon atoms wherein said metal-free pre-ceramic polymer is capped at one or both ends by a capping or chain-terminating group selected from the group consisting of an amine or polyamine.
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer and one or more co-additives, wherein the metal-free pre-ceramic polymer is a closed ring structure consisting of a repeat unit of formula (I):
- where X is NH, NR, BR3 or R4;
- and
- said metal-free pre-ceramic polymer is capped at one or both ends by a capping or chain-terminating group selected from the group consisting of an amide group, an amine or polyamine, an ester, an ether, a thioether and a polymeric residue.
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity, a minor amount of a metal-free pre-ceramic polymer and one or more co-additives, wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (I):
- where X is NH, NR, BR3 or R4;
- or wherein the metal-free pre-ceramic polymer contains a repeat unit of formula (II), (III), (IV):
- wherein R, R1, R2, R3, R4, R5, R6 and R7 are independently linear, branched or cyclic alkyl or alkenyl groups, or aryl groups containing 1 to 30 carbon atoms, where said metal-free pre-ceramic polymer is capped at one or both ends by a capping or chain-terminating group selected from the group consisting of an amide group, an ester, an ether, a thioether and a polymeric residue.
Dependencies are inferred from the claim text.